Universal Rounded Rectangle Clip
thingiverse
I encourage you to join me over on Printables. Thingiverse seems to be an abandoned platform. I will leave my models active here for posterity, but I have moved this model to https://www.printables.com/model/219972-universal-rounded-rectangle-clip - - - Customizable clip that will fit any rounded rectangle. You will need to know the following measurements of the item you want to clip: width, height, corner radius. To get the corner radius I just held up and compared various circular things until I found one that matched the same curve as the item I wanted to clip. In my case it ended up being a marker cap. I was able to then measure that with calipers to get the diameter I needed. The specific use case I had this time was to mount the Ethernet Tag Manager from Wireless Sensor Tags. https://wirelesstag.net/specs.html#manager Modify using OpenSCAD from http://www.openscad.org. Open the included .scad file, modify the variables at the top, render and export your STL.
With this file you will be able to print Universal Rounded Rectangle Clip with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Universal Rounded Rectangle Clip.